Table 8-4 Calculated Reflection Loss in dB of Metal Sheet, Both Faces (8-2), (8-3)

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Table 8-4
Calculated Reflection Loss in dB of Metal Sheet, Both Faces (8-2), (8-3)
Reflection Loss*
Iron
0.17)
Magnetic
Electric
Plane
Electric
Magnetic
Plane
Magnetic
Electric
Field
Field
Wave
Field
Field
Field
Wave
Field
Field
r = 30.5 cm
Field
r = 30.5 cm
r = 30.5 cm
r = 30.5 cm
r = 30.5 cm
r = 30.5 cm
150
- 0 . 9 **
241
113
22
279
1000
60.0 Hz
101
138
1000
0.9
204
34
242
1.0 kHz
128
1000
8.0
174
91
44
212
10.0 kHz
79
117
10.0
54
1000
139
56
177
150.0 kHz
28.0
72
64
152
108
62
700
116
1.0 MHz
96
42.0
83
63
76
117
115
74
400
15.0 MHz
57.0
64
61
84
92
88
90
82
100
100.0 MHz
59.0 +
59
76
10
59 +
76+
76 +
1.5 GHz
1
61.0 +
61
10.0 GHz
61 +
68 +
68
69+
* If Absorption Loss <15 dB, use Correction Factor C
** The Reflection Loss for iron is zero at 620 Hz, it is a negative quantity at 60 Hz, zero at 31.5 Hz, and becomes positive at lower frequencies.
* * * Plane-Wave Field not provided (normally close to that of copper),
+ At these frequencies and for given distance, the field becomes a plane wave.